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Top Questions
78
votes
Does quantum mechanics play a role in the brain?
quantum-mechanics
biophysics
estimation
perception
asked Jan 10, 2016 at 9:08
physics.stackexchange.com
72
votes
Why do beams of light (from torches or other directed sources) not extend to infinity?
optics
visible-light
everyday-life
asked Mar 15, 2016 at 11:59
physics.stackexchange.com
55
votes
Why should the Planck constant be a constant throughout all space?
quantum-mechanics
spacetime
physical-constants
asked Oct 13, 2015 at 7:14
physics.stackexchange.com
37
votes
Cutting out a circle using circles
probability
geometry
measure-theory
random-variables
recreational-mathematics
asked Jan 16, 2017 at 3:34
math.stackexchange.com
26
votes
Does average lifetime even mean anything?
quantum-mechanics
nuclear-physics
radioactivity
statistics
half-life
asked Apr 28, 2015 at 9:41
physics.stackexchange.com
23
votes
What determines the spiral direction of plants?
botany
plant-physiology
plant-anatomy
chirality
asked Apr 18, 2015 at 0:26
biology.stackexchange.com
22
votes
Does having a finite number of generators, each having finite order, imply that the group is finite?
group-theory
finite-groups
asked Dec 24, 2016 at 3:58
math.stackexchange.com
19
votes
Why concentrated sulfuric acid for dehydration and dilute for hydration?
organic-chemistry
acid-base
reaction-mechanism
asked Nov 23, 2014 at 7:46
chemistry.stackexchange.com
18
votes
French for “blood will tell”
expressions
anglais
proverbes
asked Jun 16, 2017 at 12:22
french.stackexchange.com
17
votes
Why do we launch rockets during the day?
orbital-motion
reference-frames
rocket-science
celestial-mechanics
relative-motion
asked Sep 8, 2015 at 8:45
physics.stackexchange.com
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Top Answers
49
How can we take pictures of something billion of light years away?
physics.stackexchange.com
28
No results on Google Search in normal mode, but results in incognito?
webapps.stackexchange.com
10
Is this statement of conservation of charge circular?
physics.stackexchange.com
8
How do electrons know when a circuit is closed?
physics.stackexchange.com
8
How can the mass of an unstable composite particle become complex?
physics.stackexchange.com
6
Can I sum two vertices with the same number of fields, e.g. two quartic interactions?
physics.stackexchange.com
5
Where are the right-handed leptons?
physics.stackexchange.com
5
Real time lattice simulation
physics.stackexchange.com
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